Abstract
Four isomorphous lanthanide complexes, [Ln2(L)6(H2O)2]·2H2O [Ln=Ce (1), Ln=Nd (2), Ln=Sm (3), Ln=Pr (4)] (HL=4-Hydroxy-6-methylnicotinic acid) were synthesized by the reaction of nitrate salts of LnIII and HL by hydrothermal method, which were characterized by single-crystal X-ray diffraction, elemental analysis, FT-IR spectra, UV–vis spectra, TG analyses and X-ray powder diffraction (XRPD). The crystal structures of 1–4 consist of homodinuclear species, which bridged by two oxygen atoms from two L ligands. The photoluminescence properties of compounds 3 and 4 in the solid state at room temperature were investigated. The complex 3 is demonstrated orange–red luminescence, while the luminescence spectrum of complex 4 is typical for the praseodymium complexes.
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